What Is The Difference Between AsyncPostBack And SyncPostBack
Dec 26, 2010What is AsyncPostBack, SyncPostBack and what is the difference between those methods?
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RegisterPostbackcontrol In Asyncpostback Of A Control?
Mar 2, 2011I have an ASPX page with two UpdatePanels, one on the left that holds a Tree and other on the right where I load dynamically user controlsAsynchronously.One user control, that I used on right panel, has a FileUpload control and a button to save that file on server.FileUpload has a side button Upload, that is responsible for full postBack, but first time it fileUpload.HasFile is false, but second time its trueWhy?On dynamically loading userControl i am doing
((Master)this.Page.Master).RegisterPostbackTrigger(btnUpload);
and master has method
public void RegisterPostbackTrigger(Control triggerOn) {
ScriptManager1.RegisterPostBackControl(triggerOn);
}
Updatepanel Gives Full Postback Instead Of Asyncpostback
Nov 30, 2010I have run into what seems to be a very famous problem: My updatepanel fires a full postback instead of a async postback. The normal solution is to give all controls you add dynamically an ID, which I have done, but I still get a full postback instead of my async postback. Here's the code:
HTML:
<asp:UpdatePanel ID="ItemsUpdatePanel" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="False">
<Triggers>
</Triggers>
<ContentTemplate>
<asp:ListView ID="PlayerItems" runat="server" GroupItemCount="5"
onitemdatabound="PlayerItems_ItemDataBound">
<LayoutTemplate>
... Listview stuff ...
</asp:ListView>
</ContentTemplate>
</asp:UpdatePanel>
The interesting part is the C# code behind (method PlayerItems_ItemDataBound), which is like the following:
ImageButton imgBtn = new ImageButton();
imgBtn.ID = "itemBtn";
imgBtn.Width = Unit.Pixel(30);
imgBtn.ImageUrl = "~/Images/Game/Items/" + myItem.ItemImageUrl;
ContextMenu menu = new ContextMenu();
menu.BoundControls.Add(imgBtn);
menu.ItemCommand += new CommandEventHandler(menu_ItemCommand);
menu.AutoHide = true;
menu.RolloverColor = Color.Gray;
menu.ID = "MenuMenu";
Panel panel = (Panel)(e.Item.FindControl("ItemPanel"));
panel.Controls.Add(imgBtn);
panel.Controls.Add(menu);
AsyncPostBackTrigger trig = new AsyncPostBackTrigger();
trig.ControlID = menu.UniqueID;
trig.EventName = "ItemCommand";
ItemsUpdatePanel.Triggers.Add(trig);
So, I actually add an AsyncPostBackTrigger to the menu, so the ItemCommand event should be registered. What happends when I click an item in this contextmenu, is a full postback happends. I have been trying to play with the ChildrenAsTriggers property without help.
How To Find Which Control Made The Asyncpostback
May 19, 2010I know how to find which control made the postback, it's something like:
string postBackControl = Request.Params.Get("__EVENTTARGET") == null ? string.Empty : Request.Params.Get("__EVENTTARGET");
but how can I find the one that made async postback?
AJAX :: Google Map Not Visible After AsyncPostBack?
Oct 16, 2010This is my test page (see below). As you can see, I have an UpdatePanel and everything works ok, except the google Map (of course in this test page there is only the google map). The Google Map loads perfectly on initial load, but click the button to refresh the UpdatePanel, and the google map disapears. How do I make this visible and hidden when I want it to?
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GMapTest.aspx.cs" Inherits="GMapTest" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<%@ Register Src="GMap.ascx" TagName="GMap" TagPrefix="uc1" %>
[code]...
AJAX :: AsyncPostBack Trigger Not Refreshing The Gridview?
Jan 8, 2010I have a problem when the databound gridview is not getting refreshed by the trigger that set to the dropdown outside the update panel. Both controls on ascx control that resides on the tabpanel within aspx page. I realise that both need to be in the same contianer, but because it's an ascx, I can't use Content (but it's used on the aspx main page. How to trigger the refresh of the grid?Here's the simplified code:
//Main Page - aspx
<asp:Content
ID="Content1"
[code]...
AJAX :: Updatepanel Asyncpostback Triggering A Full Postback
Apr 1, 2011We have a fairly complex content management system where we start with a blank page with just an updatepanel, then in the init function add all the controls, this all works fine.The problem I'm having is that when the loginform control logs in, we get data back from the server that looks like:
|#||4|64|pageRedirect||%2findex.aspx%3feventid%3d1079%26AspxAutoDetectCookieSupport%3d1|1|#||4|15647|updatePanel|ctl00_ContentPlaceHolder1_contentup|
<span id="ctl00_ContentPlaceHolder1_DEBUG"></span><div id="ctl00_ContentPlaceHolder1_content">
<div class="contentWrapper">
<div class="form">
<div id="errors">
<div id="ctl00_ContentPlaceHolder1_ctl03" style="display:none;">
</div></div>
[code]...
AJAX :: Runtime Added Linkbuttons Into UpdatePanel - Fullpostbacks - Instead Of Asyncpostback
Mar 27, 2011I have controls which are added at run-time to a PlaceHolder control on the page which is inside an UpdatePanel. The first refresh of the UpdatePanel is fine but subsequent actions create copies of everything on the page. I get two sets of the run-time added controls on the same page. It's not smart enough to realize that the second set replaces the first set. Has anyone else seen this? Runtime added linkbuttons into UpdatePanel ;fullpostbacks instead of asyncpostback.All parameters of UpdatePanel are default. adding controls runtime like this:
[Code]....
AJAX :: Setting Up An Update Panel With A Custom Asyncpostback Trigger?
Mar 27, 2010I need to do a partial update of a page using an UpdatePanel but I want to throw it using onkeydown. Is there a way to do this by creating a custome asyncpostback trigger.
View 4 RepliesJavascript To Detect Start And End Of AsyncPostback Of Specific Update Panel?
Aug 24, 2010<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_endRequest(endRequest);[code]....
This code will work on every AsyncPostback, but I want it to work Update-Panel specific.Not being too familiar with JS, I don't know where I to do the modification.
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Sep 26, 2012I have a simple file upload control inside grid, and have to upload file without postback in grid having button inside updatepanel.
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View 1 RepliesAsyncPostBack Firing On Child Textbox Trigger, But TextChanged Event Not Firing?
Jan 22, 2010I'm sure I'm missing something extremely obvious here, but at this point I can't see it so I need the help.Anyway, I've got a repeater inside of an UpdatePanel. As of right now, I've stripped it down to this, just to try and isolate the problem:
[Code]....
Whether I add the handler during itemdatabound or I add the handler within the repeater itself, it doesn't seem to matter...the event itself doesn't fire. The AutoPostback itself seems to fire, but the event itself doesn't.
AJAX :: AsyncPostback Trigger And Postbak Trigger For One Control?
Oct 31, 2010I have UpdatePanel with GridView and i want register posback triger for index changing and asyncpostback for pagging and sorting.
When registering AsyncPostback (with event) and Postback in one control i have ASP event.
How go around this problem? , dynami register triggers mayby is a solution but i can`t unregister triger.
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However, I've noticed that
<img src='<%=ResolveUrl("~/Images/MyImage.jpg")%>' alt="blah">
works, whereas
<img src='<%: ResolveUrl("~/images/MyImage.jpg")%>' alt="blah">
doesn't.
I'm not sure what the name for these types of expressions are so I've had trouble googling it.
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View 6 RepliesDifference Between <%: And <%=?
Sep 3, 2010Possible Duplicate:
ASP.NET “special” tags
I hope this isn't too much of a newbie question. I seem to always use the correct syntax, but I don't really understand why I'm using the <%: and <%= in ASP.NET, and I was hoping someone could clarify for me. I found this article which explains <%= and <%#, but wasn't able to find anything in Google on <%:.
Examples of where I have used the various syntax:
<div>
<%: Html.LabelFor(model => model.Type) %>
<%: Html.TextBoxFor(model => model.Type)%>
</div>
and
<div id="header-menu">
<ul>
<li><%= Html.ActionLink("Home", "", "Home" )%></li>
</ul>
</div>
Possible Answer (per ChrisF): ASP.NET "special" tags
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